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CVE-2025-68762— net: netpoll: initialize work queue before error checks

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于netpoll中工作队列初始化顺序不当，可能导致内核警告。

AI Predicted 5.0 Difficulty: Moderate EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 248f6571fd4c51531f7f8f07f186f7ae98a50afc< a90d0dc38a10347078cca60e7495ad0648838f18 affected
248f6571fd4c51531f7f8f07f186f7ae98a50afc< 760bc6ceda8e2c273c0e2018ad2595967c3dd308 affected
248f6571fd4c51531f7f8f07f186f7ae98a50afc< e5235eb6cfe02a51256013a78f7b28779a7740d5 affected
6.15 affected
< 6.15 unaffected
6.17.13≤ 6.17.* unaffected
6.18.2≤ 6.18.* unaffected
6.19≤ * unaffected
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I. Basic Information for CVE-2025-68762

Vulnerability Information
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Vulnerability Title
net: netpoll: initialize work queue before error checks
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: netpoll: initialize work queue before error checks Prevent a kernel warning when netconsole setup fails on devices with IFF_DISABLE_NETPOLL flag. The warning (at kernel/workqueue.c:4242 in __flush_work) occurs because the cleanup path tries to cancel an uninitialized work queue. When __netpoll_setup() encounters a device with IFF_DISABLE_NETPOLL, it fails early and calls skb_pool_flush() for cleanup. This function calls cancel_work_sync(&np->refill_wq), but refill_wq hasn't been initialized yet, triggering the warning. Move INIT_WORK() to the beginning of __netpoll_setup(), ensuring the work queue is properly initialized before any potential failure points. This allows the cleanup path to safely cancel the work queue regardless of where the setup fails.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于netpoll中工作队列初始化顺序不当，可能导致内核警告。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 248f6571fd4c51531f7f8f07f186f7ae98a50afc ~ a90d0dc38a10347078cca60e7495ad0648838f18 -
Linux Linux 6.15 -

II. Public POCs for CVE-2025-68762

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III. Intelligence Information for CVE-2025-68762

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Other References for CVE-2025-68762 (3)

Same Patch Batch · Linux · 2026-01-05 · 16 CVEs total

CVE-2025-68761 7.8 HIGH hfs: fix potential use after free in hfs_correct_next_unused_CNID()
CVE-2025-68764 7.8 HIGH NFS: Automounted filesystems should inherit ro,noexec,nodev,sync flags
CVE-2025-68753 7.1 HIGH ALSA: firewire-motu: add bounds check in put_user loop for DSP events
CVE-2025-68752 iavf: Implement settime64 with -EOPNOTSUPP
CVE-2025-68751 s390/fpu: Fix false-positive kmsan report in fpu_vstl()
CVE-2025-68754 rtc: amlogic-a4: fix double free caused by devm
CVE-2025-68755 staging: most: remove broken i2c driver
CVE-2025-68756 block: Use RCU in blk_mq_[un]quiesce_tagset() instead of set->tag_list_lock
CVE-2025-68757 drm/vgem-fence: Fix potential deadlock on release
CVE-2025-68758 backlight: led-bl: Add devlink to supplier LEDs
CVE-2025-68759 wifi: rtl818x: Fix potential memory leaks in rtl8180_init_rx_ring()
CVE-2025-68760 iommu/amd: Fix potential out-of-bounds read in iommu_mmio_show
CVE-2025-68763 crypto: starfive - Correctly handle return of sg_nents_for_len
CVE-2025-68765 mt76: mt7615: Fix memory leak in mt7615_mcu_wtbl_sta_add()
CVE-2025-68766 irqchip/mchp-eic: Fix error code in mchp_eic_domain_alloc()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-68762

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